MATERIALS RESEARCH BULLETIN
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2025
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IF 5.7
Yan Wang,Hui Liu,Wenzhi Li,Na Li,Guoyong Wang,Xiaochao Zhang
Rational structural design of S-scheme heterojunctions in semiconductor-based photocatalysts constituted a pivotal strategy for optimizing their photocatalytic performance through efficient charge carriers separation and enhanced redox capability. Herein, a novel two-dimensional 2D/2D heterostructure is successfully constructed by integrating bismuth oxychloride (BiOCl) nanosheets onto g-C 3 N 4 nanosheets, which significantly enhances the interfacial contact area between these two components and facilitates the migration of photogenerated charge carriers by forming a built-in electric field. Specifically, thiourea, urea, and melamine are employed as the precursor to prepare a series of g-C 3 N 4 /BiOCl photocatalysts, denoted as T-CN/BiOCl, U-CN/BiOCl, and M-CN/BiOCl, respectively. Benefiting from the excellent hydrophilic characteristics, wide photoresponse ranges and efficient interfacial charge transfer, M-CN/BiOCl displays exceptional degradation performance for both cationic rhodamine B (RhB) dyes and anionic methyl orange (MO). Under simulated sunlight irradiation, the photocatalytic degradation of RhB (20 mg/L) and MO (20 mg/L) can exhibit distinct kinetics, with complete removal achieves in 10 min and 100 min , respectively. Notably, the degradation rate constants of RhB demonstrate the remarkable superiority, being 29.2-fold and 475.2-fold higher than those of MO under simulated sunlight and visible light irradiation.
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Nanoscale
·
2022
·Vol. 14
·期 35
·12909-12917
·
IF 8.307
Tianhui Wang,Liang Xu,Zhijie Wu,Yongjin Li,Zhaoyi Yin,Jin Han,Zhengwen Yang,Jianbei Qiu,Zhiguo Song
Rare earth (RE) ions combined with two-dimensional (2D) semiconductors can exhibit unexpected optical properties. However, fluorescence quenching has always been inevitable due to defects associated with the synthesis and doping of 2D materials. In this work, we reported an efficient upconversion (UC) enhancement of Er3+ doped BiOCl nanosheets, utilizing a defect engineering strategy conversely rather than eliminating defects. Experiments and theoretical calculations provide evidence that oxygen vacancies (OVs) and lattice strain are simultaneously formed in the BiOCl:Er3+ nanosheets through self-doping of Cl− ions. Under 980 nm excitation, samples doped with 300 mol% Cl− ions exhibit the best luminescent emission, and the green and red UC emissions are enhanced 3.5 and 15 times, respectively. We showed that the OVs in the 2D semiconductor can act as energy bridges to transfer charges to the Er3+ energy level, enriching the electron population at the excited levels; while, the lattice strain enhances the energy transfer and charge accumulation, which synergistically enhance the UC luminescence. This research provides a new insight into the development of defect engineering for UC PL in 2D nanomaterials.
研究领域:
材料科学
·
光学
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2026
·
IF 5.7
Shihui Zang,Yusong Pan,Qianqian Liu,Run Huang
S-doped BiOCl nanosheets with tunable band structure were successfully synthesized via a solvothermal method. • Bifunctional vis/PMS system was constructed, enabling synergistic photocatalysis and PMS activation. • Enhanced performance is attributed to improved visible-light absorption and efficient charge separation. • Non-•OH dominated pathway involving •O 2 − , 1 O 2 , and h + governs the degradation process. Elemental doping was considered as an effective strategy for modulating the band structure of semiconductors. In this study, Sulfur doped BiOCl nanosheet catalysts were prepared by a solvothermal method and systematically characterized using XRD, FTIR, SEM, TEM, XPS, and DRS to analyze their crystalline structurdeclaration. e, morphology, surface chemistry, and optical characteristics. The optimized S-doped BiOCl (BiOCl-S) catalyst demonstrated remarkable catalytic performance in the vis/PMS synergistic system. Experimental results validated that the optimal degradation efficiency of the BiOCl-S catalysts was achieved at 4% S-doping, beyond which further increasing the S content led to a decline in activity. Under optimal condition, the BiOCl-S catalyst achieved 97.08% RhB removal within 25 min in the vis/PMS synergistic system, representing a substantial improvement over individual visible-light (32.55%) or PMS-only (48.69%) systems. Cyclic tests validated the outstanding stability of the catalyst. The key reactive species responsible for pollutant degradation, as identified through radical trapping experiments, were found to be holes (h + ), superoxide radicals (•O₂ − ), and singlet oxygen ( 1 O₂). Mechanistic investigation revealed that the enhanced catalytic activity originated from two effects such as enhanced visible-light absorption capability and effective activation of peroxymonosulfate (PMS) through bismuth ion mediation. This dual-function mechanism enables efficient pollutant degradation through combined photocatalytic and advanced oxidation pathways.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jiayang Zhao,Gang Liu,Xinmei Liu,Limin Dong,Dongbo Wang,Fei Li,Yuewu Huang,Zhitao Yang,Wenlong Yang,Liancheng Zhao
The practical implementation of semiconductor photocatalysis is often impeded by three key challenges: restricted light absorption, rapid recombination of photogenerated charge carriers, and inadequate stability in complex aqueous environments. In this work, a g-C 3 N 4 /BiOCl heterojunction photocatalyst was successfully fabricated. The synergistic effects of its porous structure, oxygen vacancies, and Bi–N bonds significantly boost the photocatalytic performance. Photoelectrochemical analyses reveal that the heterojunction not only extends the optical absorption edge to the visible region but also enhances the photocurrent response and reduces charge transfer resistance, leading to efficient separation and transport of photogenerated carriers. Under irradiation with a 300 W xenon lamp equipped with a 420 nm cutoff filter, the g-C 3 N 4 /BiOCl heterojunction exhibited significantly enhanced photocatalytic activity in the degradation of Rhodamine B (RhB) and reduction of hexavalent chromium (Cr(VI)) relative to pristine g-C 3 N 4 and BiOCl. Notably, the g-C 3 N 4 /BiOCl-2 sample achieved 99.12% removal of 20 mg/L Cr(VI) within 25 min, with a reaction rate constant of 0.10098 min −1 —1.88-fold and 2.72-fold higher than those of pristine BiOCl and g-C 3 N 4 , respectively.Environmental adaptability studies revealed that this heterojunction exhibited optimal Cr(VI) reduction performance under acidic conditions (pH=3). Its photocatalytic reduction efficiencies in deionized water, tap water, river water, and industrial wastewater were 97%, 87.6%, 81.4%, and 73.1%, respectively, highlighting its strong practical applicability in diverse aqueous environments. Common ion influence experiments further confirmed that NH 4 + promotes the reduction process, while CO 3 2- and PO 4 3- inhibit the reaction due to the alkaline environment generated by hydrolysis. Cl - , SO 4 2- , and Ca 2+ had negligible effects. Cycling tests revealed that g-C 3 N 4 /BiOCl-2 maintained over 85% photocatalytic activity after five cycles, exhibiting superior durability compared to pure g-C 3 N 4 (11.1%) and BiOCl (39.7%). This work enhance the photocatalytic reduction of heavy metals in complex aqueous environments through the construction of a highly efficient and stable S-scheme heterojunction photocatalyst, thereby offering theoretical and experimental foundations for the degradation of industrial dye pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Manyu Liu,Xinyu Zhao,Keyi Han,Yangfan Du,Yingbin Liang,Xin Zhang,Shifeng Wang,Dongye Zhao,Yifang Liang,Yong Li
Environmental pollution control represents a major challenge for modern society, and photocatalytic technology has emerged as a promising approach to address this issue due to its eco-friendly nature and high efficiency. However, the efficiency of photocatalysis is constrained by the rapid recombination and inefficient migration of photogenerated charge carriers. This study proposes an innovative strategy to synergistically enhance photocatalytic performance by maximizing the exposure of intrinsic symmetric electric fields (ISEFs) in two-dimensional layered bismuth oxychloride (BiOCl) and introducing oxygen vacancies (OVs). BiOCl nanosheets with enhanced ISEFs exposure and abundant OVs were successfully synthesized via a hydrothermal method by regulating the ethylene glycol-to-water ratio.The results revealed that exposure of ISEFs significantly reduced the exciton binding energy, thereby facilitating efficient separation and migration of photogenerated electron-hole pairs. Concurrently, the introduction of OVs generated new electronic states near the Fermi level, providing additional pathways for electron transitions, which narrowed the bandgap and enhanced light absorption. Furthermore, OVs shifted the d-band center closer to the Fermi level, significantly enhancing the adsorption capacity for reactant molecules. Experimental results demonstrated that the optimized sample BOC-5 achieved 99 % degradation of rhodamine B (RhB) within 15 min, exhibiting a 55-fold enhancement in performance compared to the sample prepared in pure water.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jiaoping Si,Hongjing Liu,Wendong Zhang,Dengyu Jiao,Wangxing Ai,Yuerui Ma,Lihuan Feng,Xing’an Dong,Wenjie He,Peng Chen
The catalytic conversion of nitrogen oxides (NO x ) to non-toxic products has emerged as a critical strategy for air pollution control under stringent emission regulations. Photocatalytic NO x removal performance highly depends on the transmission of photogenerated electrons and the amount of reactive oxygen species (ROS) generated. Herein, the Bi/BiOCl/SrTiO 3 heterostructure photocatalyst was prepared by a simple in situ synthesis method to address the limitations of conventional NOx removal systems. Due to the synergistic effect of bismuth (Bi) surface plasmon resonance (SPR) and the built-in electric field in BiOCl/SrTiO 3 S-scheme heterojunction, Bi/BiOCl/SrTiO 3 showed strong light absorption ability and high charge separation efficiency, with the highest NO removal efficiency reaching 70 %. The enhanced electronic interaction between Bi and BiOCl/SrTiO 3 induced Bi-O covalent bonds with the BiOCl layer to facilitate fast charge separation, promoting the rapid transfer of interfacial photogenerated carriers, this process induces the activation of O 2 and H 2 O to form reactive oxygen species (ROS) to promote the oxidative removal of NO. This study provides new insights into the development of effective photocatalysts with fast charge separation by synergistic metal active sites and built-in electric field of heterojunction for air pollutant purification.
研究领域:
环境科学
·
材料科学
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Jiehong Huang,Weizhen Chen,Xiang Yu,Xionghui Fu,Yi Zhu,Yuanming Zhang
In this work, a ternary BiOCl/carbon quantum dots (CQDs)/reduced graphene oxide (rGO) composite photocatalyst with high removal efficiency of ciprofloxacin was fabricated. For BiOCl/CQDs/rGO-10, rGO greatly enhanced the adsorption capacity, while rGO and CQDs significantly improved the photocatalytic performance by enhancing the charge separation and charge injection, which were 3.8 and 8.4 times higher than those of BiOCl, respectively. Interestingly, the photon absorption rate of BiOCl/CQDs/rGO-10 was only 1.3 times higher than that of BiOCl, suggesting that CQDs and rGO could not improve the effective light absorption although they could enhance the light harvesting ability and demonstrating the enhancement in light harvesting ability was not an essential factor for improving photocatalytic activity. In addition, BiOCl/CQDs/rGO-10 displayed high stability and the photocatalytic mechanism of ciprofloxacin was also proposed. This work not only exhibited an excellent reference with outstanding adsorption-photocatalytic performance in application of water remediation, but also provided a new insight into the roles of CQDs and rGO in the adsorption and photocatalysis for CQDs or rGO based composite photocatalysts.
研究领域:
环境科学
·
材料科学
·
水处理
·
光催化
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Sizhao Zhang,Feng Ding,Xuegang Luo,Xiaoyan Lin
Hierarchical Mo-doped S/BiOCl (MSB) heterostructures were successfully prepared by a facile one-step reflux method. The resulting samples were evaluated by XRD , SEM, TEM , DRS and XPS . The results obtained showed that MSB possessed an outstanding photo and/or thermocatalytic performance under near room-temperature for removal of methylene blue (MB), reaching up to 99.9 and 96.5% for photo/thermocatalytic degradation (PTD) and thermocatalytic degradation (TD), respectively. The hole/radical scavenger tests indicated holes and free radial were both participated in PTD and TD reactions, but the holes formed from degradation reactions were strongly considered as the most influential impact on conducting PTD and TD patterns rather than free radicals. Furthermore, the kinetics regarding PTD and TD routes were also monitored, preferentially fitting to Langmuir–Hinshelwood behavior. Briefly, this study may provide new insights into fabricating hierarchical heterostructures by in-suit one-step approach for decontamination of organic pollutants separately using PTD or TD.
研究领域:
材料科学
·
环境科学
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Lulu Zhu,Baiyu Zhang,Qian Su,Runlu Liu,Jingyi Lin,Hua Wang,Shenmin Zhu,Yao Li
Photoinduced charge separation and surface reactions are essential for ensuring high quantum efficiency of the photochemical and photophysical processes. BiVO4-based heterojunctions are promising materials for high-performance photocatalysts; however, their photocatalytic performance is significantly lower than the theoretical limit due to the sluggish water oxidation dynamics and rapid recombination of charge carriers on the catalyst surface. To address these issues, oxygen vacancies (OVs) are introduced to a rationally designed BiVO4-based heterojunction using built-in potential and gradient OVs to promote the separation of carriers and increase the photocatalytic activity. The heterojunctions with OVs exhibit a 2-fold increase in the photocatalytic activity for phenol degradation compared with that of pristine BiVO4. Additionally, density functional theory is applied to elucidate the synergistic mechanism of light absorption and charge separation in BiOCl/BiVO4 p–n heterojunction photocatalysts containing vacancies. The obtained results demonstrate a synergistic effect of vacancies and the built-in potential, providing a pathway for defect engineering in photocatalytic processes.
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CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Fan Fu,Jian Yang,Hao Xu,Yang Li,Shaobo Cao,Kang Da,Wenting Chen,Ximei Fan
Doping or constructing heterojunctions by coupling with other semiconductors are effective methods to improve the photocatalytic performance of graphitic carbon nitride (g-C 3 N 4 ) in toluene degradation. Herein, thermally condensed synthesized K-doped g-C 3 N 4 (KCN) is coupled with BiOCl via a hydrothermal method, and KCN/BOC heterostructures are obtained. The optimal KCN 1 /BOC heterojunction exhibits approximately 85% removal of toluene after 150 min irradiation under simulated solar light, which is 12.4 and 9.6 times higher than those of g-C 3 N 4 and BiOCl, respectively. The superior performance of KOH-modified g-C 3 N 4 is attributed to the electron transfer channels formed by the insertion of K + into the g-C 3 N 4 layers, which facilitate efficient charge separation and rapid electron transfer. Furthermore, the KCN/BOC heterostructure with the Z-scheme further improves the surface charge separation efficiency, which plays a critical role in the photocatalytic process. This work provides a facile and promising strategy for dual-strategy modification of g-C 3 N 4 to enhance photocatalytic degradation activity.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Jun Liu,Hui Wang,Meng-Jie Chang,Wen-Juan Li,Wen-Yao Zhu,Ge Bai,Liu-Qing Yang,Hui-Ling Du,Zhen-Min Luo,Ting Shang
Metal ion doping is an efficient method to achieve high photocatalytic performance of semiconductors. However, the current synthetic methods by using inorganic salts as doped sources in the precursor reaction system might suffer from ion waste and second pollution. Herein, we developed a novel method by employing electrospun nanofibers as ion reservoir to release metal ions for the synthesis of ion-doped semiconductors with high photocatalytic activity . As demonstrated, Co/Fe co-doped BiOCl photocatalyst (Co/Fe-BOC) was facilely prepared in the presence of CoFe 2 O 4 nanofibers as Co and Fe ion reservoir via a simple solvothermal method . Compared with BiOCl, the resulted Co/Fe-BOC shows increased specific surface area, visible light response as well as separation and transportation efficiencies of photogenerated carriers. Thus, the Co/Fe-BOC exhibits significantly enhanced visible light photocatalytic activity to degrade 99.4% rhodamine B (RhB) within 4 min. This new doping approach not only avoids the ion waste and pollution during the reaction process but also facilitates the separation of the photocatalyst. Moreover, the CoFe 2 O 4 nanofibers could be repeatedly used as ion reservoir to prepare high-performance Co/Fe-BOC. This nanofiber-based ion doping approach provides a novel, universal and promising insight to obtain doped semiconductors with high photocatalytic activity.
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INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Lianyang Zhang,Yue Meng,Hui Shen,Jinhua Li,Chunfang Yang,Bo Xie,Shengjie Xia
In this work, the advantages of in situ loading, heterojunction construction, and facet regulation were integrated based on the poly-facet-exposed BiOCl single crystal, and a facet-oriented supported heterojunction of Cu2O and BiOCl was fabricated (Cu2O@BiOCl[100]). The photocatalytic nitrogen reduction reaction (pNRR) activity of Cu2O@BiOCl[100] was as high as 181.9 μmol·g–1·h–1, which is 4.09, 7.13, and 1.83 times that of Cu2O, BiOCl, and Cu2O@BiOCl-ran (Cu2O randomly supported on BiOCl). Combined with the results of the photodeposition experiment, X-ray photoelectron spectroscopy characterization, and DFT calculation, the mechanism of Cu2O@BiOCl[100] for pNRR was discussed. When Cu2O directionally loaded on the [100] facet of BiOCl, electrons generated by Cu2O will be transmitted to the [100] facet of BiOCl through Z-scheme electron transmission. Due to the directional separation characteristics of charge in BiOCl, the electrons transmitted from Cu2O are enriched on the [001] facet of BiOCl, which will together with the original electrons generated by pristine BiOCl act on pNRR, thus greatly improving the activity of photocatalytic ammonia synthesis. Thus, a new construction scheme of biphasic semiconductor heterojunction was proposed, which provides a reference research idea for designing and synthesizing high-performance photocatalysts for nitrogen reduction.
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